Scrabble/Two Letter Words

Having a knowledge of all two-letter words will greatly improve your Scrabble gameplay, either when you need to build off an existing tile to form a new word, or at the end of the game, when you have two or three tiles left and need to dump them off as quickly as possible. Two-letter words are also very useful when playing a new word parallel (alongside, above, or beneath) an existing word.

All TWL-acceptable 2-letter words are in Collins Scrabble Words (CSW). There are 19 2-letter words that are acceptable in only CSW, making a total of 124 CSW-acceptable 2-letter words:

CH#

DI#

EA#, EE#

FY#

GU#

IO#

JA#

KO#, KY#

NY#

OB#, OO#, OU#

ST#

UG#, UR#

YU#

ZO#

In particular, knowing the two-letter words containing JKQXZ will go a long way, as they can be used for huge scoring plays. For example, placing an X on a TLS and playing parallel easily nets 50+ points.